                        課程
                    
                        /前端開發
                        
                            /JavaScript
                        
                        /JavaScript進階篇

為何不顯示呢

<!DOCTYPE?HTML>
<html>
<head>
<meta?http-equiv="Content-Type"?content="text/html;?charset=utf-8">
<title>無標題文檔</title>
<style?type="text/css">

.message{????
	width:200px;
	height:100px;
	background-color:#CCC;}
	
</style>
</head>
<body>
<script?type="text/javascript">
var?num=document.createElement("p");
num.className="message";
var?numtext=document,createTextNode("I?love?javascript");
num.appendChild(numtext);
document.body.appendChild(num);


</script>?

</body>
</html>

為何不顯示呢，哪出錯了